/*
 * Copyright (c) 2006, Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This file is part of the uIP TCP/IP stack
 *
 * $Id: clock-arch.c,v 1.2 2006/06/12 08:00:31 adam Exp $
 */

/**
 * \file
 *         Implementation of architecture-specific clock functionality
 * \author
 *         Adam Dunkels <adam@sics.se>
 */
#include <stdio.h>
#include "air32f10x.h"
#include "clock-arch.h"

__IO uint32_t RunTime = 0;

clock_time_t clock_time(void)
{
  int runtime = RunTime;
  return runtime;
}

void TIM1_Init(void)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
  TIM_DeInit(TIM1);

  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_TimeBaseStructure.TIM_Prescaler =(SystemCoreClock / 1000000); // prescaler, 1MHz
  TIM_TimeBaseStructure.TIM_Period = (1000 - 1);                // Reload = 1ms
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);
  TIM_ClearFlag(TIM1, TIM_FLAG_Update);
  TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);

  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  TIM_Cmd(TIM1, ENABLE);
  printf("TIM1 Initialized\r\n");
}

void TIM1_UP_IRQHandler(void)
{
  if(TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET) {
    if (++RunTime >= 0x80000000) {
      RunTime = 0;
    }
  }
  TIM_ClearITPendingBit(TIM1, TIM_IT_Update);
}
